Machine for removing bark from logs.



F. LIBERT. MACHINE FOR REMOVING BARK FROM LOGS.

APPLICATION FILED MAY 20, 1910.

Patented Jan. 30, 1912.

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M if F. LIBBRT. MAGHINE FOR REMOVING BARK FROM LOGS.

APPLICATION TILED MAY 20, 1910.

Patented Jan. 30, 1912.

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F. LIBERT. MACHINE FOR REMOVING BARK FROM LOGS. APPLICATION FILED MAY 20, 1910.

1,01 5,898. Patented Jan. 30, 1912.

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MACHINE FOR REMOVING BARK FROM LOGS.

APPLICATION FILED MAY 20, 1910. 1,015,898, Patented Jan. 30, 1912.

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MACHINE POE REMOVING BARK FROM LOGS.

APPLIOATION FILED MAY 20, 1910.

1,015,898, Patented Jan.30,1912.

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MACHINE FOR REMOVING BARK FROM LOGS.

APPLIGATION FILED MAY 20, 1910.

Patented Jan. 30, 1912.

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UNITED STATES PATENT OFFICE.

*FRED'LTBERT, OF GREEN BAY, WISCONSIN, ASSIGNOR OF ONE-THIRD TO ARTHUR LIBERT AND ONE-THIRD T0 ALEXANDER ROBERTS, BOTH OF GREEN BAY, WIS- CONSIN.

MACHINE FOR REMOVING ,BARK FROM LOGS.

Specification of Letters Patent.

- Patented Jan. 30, 1912.

Application filed May 20, 1910. Serial No. 562,402.

I To all whom it may concern Be it known that I, FRED LIBERT, a citize of the United States, residing at Green Bay, county of Brown, and State of lVisconsin, have invented new and useful Improvements in Machines for Removing Bark from Logs, of which the following is a specification.

My invention relates to improvements in that class of machines which are used for removing the bark from logs, preparatory to converting such logs into Wood pulp, and which machines are adapted to automatically revolve a log in contact with an annular series of rapidly rotating kn1ves,'unt1l the entire exterior surface 'of the log is brought in contact with said knives and the bark thereby removed.

My present improvement pertains more especially, among other things, to the device for automatically regulating the log moving mechanism of the machine so as to cause the logs to move forwardly more or less rapidly to correspond with their differences 1n d1- ameter, whereby a given log will be retalned in contact with the bark removing knives a greater or less length of time corresponding with its circumference, or the area of the surface from which the bark is removed. For example, a small log revolving at a given speed will perform a complete revolution in a much less time than a larger log because of the fact that the surface is less, and as a consequence, a small log should be moved forwardly much faster than a large one, becausethe bark to be removed on the smaller log is less, and one of the primary objects of my invention is, therefore, to provide means, as stated, for automatically regulating the longitudinal movement of the logs of various sizes to correspond with the work to be done on such logs.

My invention is explained by reference to the accompanying drawings, in which Figure 1 is a side view. 'Fig. 2 is a front view. Fig. 3 is a rear view. Fig. 4 is a side view of the log feeding mechanism. Fig. 5 is also a side view of said log feeding mechanism in position to operate on a small log. Fig. 6 is a plan view of the "parts shown in Figs. 4 and 5. Fig. 7 is a rear view of the parts shown in Figs. 4, 5 and 6. Fig. 8 is a diagrammatic viewof a log and log turning mechanism.

Like parts are identified by the same reference numerals throughout the several vlews.

It will be understood that the-machine for supporting the logs and removing the bark therefrom comprising the stationary platform 1, the annular series of blades.2, lathe supporting disk 3, disk supporting shaft 4, shaft supporting journal bearings 5, 5, shaft supporting frame 6, base 7, disk inclosing case 8, driving pulley 9, idler 10, endless conveyer belt 11, and means for communicating motion from the driving mechanism to said endless belt, are all substantially of ordinary construction and invention herein is predicated more especially, as suggested, upon the device hereinafter described for automatically controlling the movement of the logs as the bark is being removed therefrom.

Preparatory to removing the bark from the logs, they are placed upon the platform 1, with one side bearing against the front side 14 0f the casing and when in such position, the series of knives 2 are rapidly re volved in contact with the periphery of such logs, while the logs are simultaneously revolved. As a means of revolving the logs when thu supported and acted upon, I have provide a series of disks 15, 15, each of which is provided with an annular series of barbs 16and said series of disks are preferably made of different diameters to better conform to the irregular surface of the log,-

and said disks are all supported upon and revolved together with the same central shaft 17. 7

Motion is communicated from the driving pulley 9 to the disk 15 by which the logs are revolved through the shaft 4, pulley 20, belt 21, one of the several pulleys 22, shaft 23, universal coupling 24, inclinable shaft 24, pulley 25, belt 26, pulley 27, shaft 28, pinion 29, gear wheel 30, shaft 31, miter gears 32,

33, and shaft 17, to which shaft said log re-' volving disks are rigidly aflixed and by which'disks the log 19 is revolved.

' It will be understood that the several log driving disks 15 and the intermediate driving mechanism between them and the shaft 23 are supported upon the inclinable frame 36, and that said frame 36 is pivotally supported from the stationary frame 37 by the pivotal shaft 38, whereby said inclinable frame is adapted to be moved forwardly or backwardly a greater or less distance as may be required to bring said log retaining disks into contact with logs of different diameters, while the coupling 24 permits of the required movement of the inclinable shaft 24 and the driving pulley 25 for transmitting motion from the fixed driving mechanism to the movable mechanism supported upon the inclinable frame.

Motion is manually communicated to the inclinable frame 36 and the operative mechanism supported thereon from the hand Wheels 38', 38', through the shaft 39, pinion 40, gear segment 41, and the laterally projectlng arms 42, 42, whereby the log driving disks 15 are adjusted forwardly or backwardly, as stated, to conform to and be retained in contact with logs of various diameters, and whereby the required pressure is applied to said disks to cause the barbs 16 which project radially from the periphery of said disks to penetrate the surface of the logs a sufficient depth to cause said logs to be revolved as the bark is being removed therefrom by the rotating blades 2.

It will be understood that when the disk supporting shaft 17 and the disks thereon are supported in a horizontal position, parallel with the longitudinal axis of the log, the log will be continuously revolved in the same relative position to said disks, and there will be no tendency for the log to be moved forward. When, however, the disk supporting shaft 17 is inclined at an angle to the log, as indicated in Fig. 8, the log will be simultaneously forced forwardly or longitudinally toward the left, as it is revolved by the movement of said disks and that the log will be moved forward longitudinal toward the left more or less rapidly with each revolution of the disks according to the inclination of said disk supporting shaft. I avail myself of this important fact by causing the disk supporting shaft 17 to be automatically inclined at a greater or less angle to the horizontal as the pivotally supported frame is more or less inclined toward the logs, while said logs are being turned by the revolving movement of said disks and it will be understood that said frame will be inclined more or less according to the diameter of the logs from which the bark is being removed. It will therefore be understood that when a large log is being acted upon, it will be necessary to incline said disk supporting frame but a slight distance to bring said disks in contact with such log, consequently the disk supporting shaft will be but slightly inclined and the log will therefore be moved forwardly slowly. When, however, a small log is being acted upon by said disks, said pivotally supported frame will be inclined much farther and consequently said disk supporting shaft will be inclined at a greater angle to the logs, whereby the logs will be moved forwardly threads.

proportionately faster. As a means for thus automatically tilting the disk supporting shaft at an angle to the logs, 1 have connected one end of said shaft at a fixed point with the stationary frame 37 through the journal bearing 43, frame 44,- pivotal bolt 45, link 46, sleeve 47, tilting rod 48, pivotal bolt 4.) and bracket 50. The bracket 50 is provided with a plurality of apertures 51 for the reception of the pivotal bolt 49, whereby the inclination of the tilting rod 48 may be changed and adjusted as circumstances may require. It will be understood that if the pivotal bolt 49 were located in alinement with the frame supporting bolt 38, said tilting rod 48 would move concentric with said frame and the disk supporting shaft 17 would not be tilted. When, however, the lower end of said tilting rod 48 is pivotally supported in front of the pivotal support of said frame, such parts are caused as the frame is tilted, to describe different circles around their respective supports, whereby as the frame is moved forward, the end with which said tilting rod 48 is connected is moved upward thereby communicating the required inclination to the disk supporting shaft 17 for moving the logs forward, while by a reverse movement of said frame, said disk supporting shaft 17 is brought back toward the horizontal position.

The bracket 50 is adjustably connected with the stationary frame 37 by the shaft 52, bolt 53, operating in the slot 54 of said bracket. The tilting rod 48 is adjustably connected with the sleeve 47 through the shaft 55. The shaft 55 is provided at its respective ends with right and left screw The thread on the lower end of said shaft h'as screw threaded bearings in the upper end of said tilting rod 48, while the upper end of said shaft has reversely inclined threaded bearings operating in the upper end of said sleeve 47, whereby as said threaded shaft is turned in one direction, said sleeve 47 and the parts connected therewith will be drawn downwardly to ward the upper end of said tilting rod 48, while by a reverse movement of said threaded shaft, said sleeve and the frame connected therewith will be moved in the opposite direction, whereby the inclination of the disk supporting shaft 17 to the longitudinal center of the log may be increased or diminished, as circumstances require. As a means of revolving said threaded shaft 55, I have provided the protruding end of the same with a hand wheel 56, from the side of which is a laterally projecting handle 57 by which said shaft is readily revolved in either direction at the will of the operator.

58 is a spiral spring, which is connected at one end to the frame 37 and at its oppo' site end to the inclinable frame 36, the ob-- ject of said spring being to partially counterbalance the weight of said inclinable frame and the mechanism supported therefrom, whereby said parts are more easily moved toward and from the log from which the bark is being removed.

59 is an ordinary belt shifter, which is ionnected with the operating handle 60 through the rod 61, whereby the belt 21 is adapted to be shifted from one of'the series of pulleys 22 to another, as circumstances may require.

Motion is communicated to the endless belt 11 from the shaft 23, through the pulley 62, belt 63, pulley 64, belt 65, pulley 66, shaft 67 and pulley 68, as more clearly shown in Figs. 2 and 3, said endless belt being supported at one end upon said pulley 68 and at its opposite end uponthewpulley 69, said pulley 69 being supported from the side of the disk inclosing case 8 by the bracket 70 and shaft 71. It will be understood that as the annular series of blades are rapidly revolved within the inclosing case 8, they perform the function of a fan, whereby air is drawn through the open side of said case with the bark which is removed from the log, when such bark is forced therefrom by a current of air which passes out. through the discharge duct 72 of said case. 7

lVhile I have shown and described a plurality of disks 15 respectively provided with an annular series of radial barbs 16 for revolving the log as the bark is being removed therefrom, it is obvious that said disks may, if desired, be formed integrally and while such part-s have been referred to as disks provided with radial barbs, for brevity of description, they are hereinafter referred to in the claims as spur wheels.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a machine for removing bark from logs, the combination of a rotary cutter, a cutter supporting base, a stationary frame connected with said base, an inclinable frame pivotally supported from said stationary frame, rotary spur wheels carried by said inclinable frame adapted to bear against a log and simultaneously revolve and move it longitudinally forward as the bark is being removed therefrom, means for manually forcing the spur wheels into engagement with the log, and means for automatically changing the inclination of the spur wheels to correspond to logs of different diameter, whereby the log is moved longitudinally more or less rapidly according to the area of the surface from which the bark is removed.

2. In a machine for removing bark from logs, the combination of a rotary cutter, a cutter supporting base, a stationary frame connected with said base, an inclinable frame pivotally supported from said stationary frame, rotary spur wheels carried by said inclinable frame adapted to bear against a log and simultaneously revolve and move it longitudinally forward as the bark is being removed therefrom. means for manually forcing the spur wheels into engagement with the log, means for automatically changing the inclination of the spur wheels to correspond to logs of difl'erentdiameter, whereby the log is moved longitudinally more or less rapidly according to the area of the surface from which the bark isremoved, and means for manually changing the tilting mechanism of the spur wheels so as to increase or diminish the relative speed of the longitudinal movement of the log to that of its rotation as it is being revolved.

3. In a machine of the described class, the combination of a rotary cutter, a cutter supporting base, a stationary frame connected with said base, an inclinable frame pivotally supported from said stationary frame, rotary spur wheels pivotally supported from said inclinable frame, a tilting rod pivotally connected at its lower end to said frame at a point eccentric to the pivotal support of said inclinable frame and connected at its upper end with said spur wheels, whereby as said inclinable frame is moved forward a greater or less distance corresponding to the diameter of the log, said spur Wheels will be automatically tilted at a greater or less angle to.such logs.

4. In a machine of the described class, the combination of a rotary' cutter, a cutter supporting base, a stationary frame connected with said base, an inclinable frame pivotally supported from said stationary frame, rotary spur wheels pivotally supported from said inclinable frame, a tilting rod pivotally connected at its lower .end to said frame at a point eccentric to the pivotal support of said inclinable frame and connected at its upper end with said spur wheels, whereby as said inclinable frame is moved forward a greater or less distance corresponding to the diameter of the log, said spur wheels will be automatically tilted at a greater or less angle to such logs, and means for manually increasing or diminishing the length of said tilting rod.

5. In a machine of the described class, the combination of a rotary cutter, a cutter supporting base, a stationary frame connected with said base, an inclinable frame pivotally supported from said stationary frame, rotary spur wheels pivotally supported from said inclinable frame, a tilting rod pivotally connectedat its lower end to said frame at a point eccentric to the pivotal support of said inclinable frame and connected at its upper end with said spur wheels, whereby as said inclinable frame is moved forward a greater or less distance corresponding to the diameter of the log, said spur wheels will be automatically tilted at a greater or less angle to such logs, means for manually increasing or diminishing the length of said tilting rod, and means for changing the pivotal adjustment of said tilting rod to said base.

6. In a machine of the described class, the combination of a rotary cutter, a cutter supporting base, a stationary frame connected with said base, an inclinable frame pivotally supportedfrom said stationary frame, rotary spur Wheels pivotally supported from said inclinable frame, a tilting rod pivotally connected at its lower end to said frame at a point eccentric to the pivotal support of said inclinable frame and connected at its upper end with said spur wheels, whereby as said frame is moved forward. a greater or less distance corresponding to the diameter of the log, said spur wheels will be automatically tilted at a greater or less angle to such logs, a gear segment rigidly connected with said base, a shaft revolubly supported from said inclinable frame, a gear wheel mounted on said revoluble shaft and adapted to mesh with the teeth of said gear segment, and means for manually revolving said shaft and gear segment forwardly or backwardly,

whereby said spur wheels are forced with the required pressure against or removed from said log.

7. In a machine of the described class, the combination of a rotary cutter, a cutter supporting base, a stationary frame connected with said base, an inclinable frame pivotally supported from said stationary frame,rotary spur wheels pivotally supported from said inclinable frame, a tilting rod pivotally connected at its lower end to said frame at a point eccentric to the pivotal support of said inclinable frame and connected at its upper end with said spur Wheels, whereby as said frame is moved forward a greater or less distance corresponding to the diameter of the log, said spur wheels will be automatically tilted at a greater or less angle to such logs, and means for communicating motion from the shaft of the rotary cutter to the shaft of the spur wheels carried by said inclinable frame.

In testimony whereof I atlix my signature in the presence of two witnesses.

FRED LIBERT.

lVit-nesses:

JAs. B. ERWIN, R. L. FARRINGTON. 

